Slovak folk music instruments are permanently changing. The paper documents the changes taking place in the last 10-15 years. Besides of social, economic a culture changes, those caused by organizations etc. are supplemented by concrete musical and technical aspects, as: actualization, adaptation, changing of function and place, stratigraphy, deepening specialization and professionalism in making instruments, watching their technologies, material, the used tools, principles of construction, contributing also to individual variability, tendencies of unification and norms. An important role played by festivities, festivals, meetings of the makers of instruments, also schools, workshops and many other events can accelerate interest. Media, internet access, media editions of CD a DVD improves the possibilities for the use of musical instruments in new function and social setting, e.g., the foundations of special societies for different instruments.